| Name | Bose SoundLink Flex | UE Boom 4 |
|---|---|---|
| Image |  |
 |
| Type | Medium | Medium |
| MSRP | $149 | $149.99 |
| Released | 2021 | 2024 |
| Availability | Discontinued | Available |
| Current price | Amazon | Amazon |
| Speaker configuration | ||
| Audio channels | 1.0 (mono) | 2.0 (stereo) |
| Woofers (or full range): | 1× full range | 2× 2″ |
| Tweeters: | - | - |
| Subwoofers: | - | - |
| Audio specs & features | ||
| Watts RMS | Not specified | Not specified |
| Frequency range | Not specified | 90 Hz - 20 kHz |
| Wireless stereo pairing? | ✔ TWS | ✔ via app |
| Party mode? (mono) | ✔ (Party Mode) | ✔ (PartyUp, via app) |
| Other (special) audio features? | Speakerphone, PositionIQ (adaptive EQ) | Megaphone function |
| Connectivity | ||
| Bluetooth version? | 4.2 | ? |
| Wi-Fi? | ❌ | ❌ |
| NFC? (for pairing) | ❌ | ❌ |
| Radio? | ❌ | ❌ |
| Audio inputs & outputs | ||
| Buit-in mic? (and function) | ✔ (calls, voice control) | ✔ (megaphone) |
| Guitar/mic input? | ❌ | ❌ |
| USB-A playback? | ❌ | ❌ |
| 3.5 mm AUX in? | ❌ | ❌ |
| 3.5 mm AUX out? | ❌ | ❌ |
| Other in/outputs? | ❌ | ❌ |
| Battery, power & charging | ||
| Battery? | ✔ | ✔ |
| Battery life | 12 hours | 15 hours |
| Charge time | 4 hrs | 3 hrs |
| Battery capacity | 11.4 Wh | 11.52 Wh |
| Swappable battery? | ❌ | ❌ |
| Charging port(s): | USB-C | USB-C |
| Powerbank function? | ❌ | ❌ |
| Buttons & controls | ||
| Sound mode button(s)? | ❌ | ❌ |
| Sound effect buttons? | ❌ | ❌ |
| Other (special) buttons? | Multi-function button | ❌ |
| App? | Bose Connect | UE | BOOM app |
| Voice assistant? | ✔ | ❌ |
| Lights | ||
| Colored LEDS? | ❌ | ❌ |
| Strobe LEDS? | ❌ | ❌ |
| Size & weight | ||
| Size (cm H×W×D): | 5.21×20.09×9.0 | 18.4×7.3×7.3 |
| Size (inch H×W×D): | 2.05×7.91×3.54 | 72.4×2.9×2.9 |
| Weight (kg): | 0.590 | 0.620 |
| Weight (lbs): | 1.3 | 1.37 |
| Physical features | ||
| IP Code | IP67 | IP67 |
| Transportation method? | In hand | In hand |
| Color options: | 4 colors: Black, white, blue, purple (lilac) | 4 colors: Black, blue, red, pink |
| Other features? | Loop | Floats |
| In the box | ||
| Charger/cables? | USB-A to USB-C | USB-C to USB-C |
| Accessories? | - | - |
| More info | ||
| Model number | 865983-0100 | S00176 |
| User guide / manual | Owner's guide | Online manual |
| Official site link: | Bose.com | Ultimateears.com |
Bose SoundLink Flex vs UE Boom 4
Legend:
Great/yes
Good
Not good
Bad/no
More Bluetooth speaker comparisons: